Fishburn and Hughes: "An Arab philologist and man of letters remembered for his Kitab-al-Mukham. There is some similarity between him and Borges: he was blind, and studied with his father, who was also blind." (1)

Fishburn and Hughes: "Judeo-Spanish poet and philosopher, born in Tudela when Andalusia was under Moslem rule. Known as "Admirable", he was much admired in his lifetime for his widespread learning and scholarly commentaries on the Old Testament. He also wrote religious and secular poetry in Hebrew." (1)